An enzyme-detergent method for effective prion decontamination of surgical steel

被引:69
作者
Jackson, GS [1 ]
McKintosh, E [1 ]
Flechsig, E [1 ]
Prodromidou, K [1 ]
Hirsch, P [1 ]
Linehan, J [1 ]
Brandner, S [1 ]
Clarke, AR [1 ]
Weissmann, C [1 ]
Collinge, J [1 ]
机构
[1] UCL, Inst Neurol, Dept Neurodegenerat Dis, MRC Prion Unit, London WC1N 3BG, England
关键词
D O I
10.1099/vir.0.80484-0
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Prions, transmissible agents that cause Creutzfeldt-Jakob disease (CJD) and other prion diseases, are known to resist conventional sterilization procedures. latrogenic transmission of classical CJD via neurosurgical instruments is well documented and the involvement of lymphoreticular tissues in variant CJD (vCJD), together with the unknown population prevalence of asymptomatic vCJD infection, has led to concerns about transmission from a wide range of surgical procedures. To address this problem, conditions were sought that destroy PrP(Sc) from vCJD-infected human tissue and eradicate RML prion infectivity adsorbed onto surgical steel. Seven proteolytic enzymes were evaluated individually and in pairs at a range of temperatures and pH values and the additional effects of detergents, lipases and metal ions were assessed. A combination of proteinase K and Pronase, in conjunction with SDS, was shown to degrade PrP(Sc) material from highly concentrated vCJD-infected brain preparations to a level below detection. When RML prion-infected wires were exposed to the same enzymic treatment, intracerebral bioassay in highly susceptible hosts showed virtually no infectivity. The prion-degrading reagents identified in this study are readily available, inexpensive, non-corrosive to instruments, non-hazardous to staff and compatible with current equipment and procedures used in hospital sterilization units.
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页码:869 / 878
页数:10
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